问题
单项选择题
车站施工采用中洞法施工即先将大断面分成三个洞室，每个洞室跨度为（）。
A、7.5m
B、8m
C、8.5m
D、9m
答案
参考答案：A
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车站施工采用中洞法施工即先将大断面分成三个洞室，每个洞室跨度为（）。
A、7.5m
B、8m
C、8.5m
D、9m
参考答案：A
完形填空（共20小题；每小题2分，共40分） There was a woman in Detroit, who has two sons．She was worried 36 them, especially the younger one, Ben, 37 he was not doing well in school． Boys in his class 38 fun of him because he seemed so 39 ． The mother 40 that she herself, would have to get her sons to do better in school．She 41 them to go to the Detroit Public Library to read a 42 a week and do a report about it for her． One day, in Ben’s 43 , the teacher held up a rock and asked if anyone knew it. Ben 44 up his hand and the teacher let him 45 ．“Why did Ben raise his hand?” they wondered． He 46 said anything; what could he possibly want to say? Well, Ben not only 47 the rock; he said a lot about it． He named other rocks in its group and even knew 48 the teacher had found it． The teacher and the students were 49 ． Ben had learned all this from doing one of his book 50 ． Ben later went on to the 51 of his class．When he finished high school, he went to Yale University 52 at last became one of the best doctors in the United States． After Ben had grown up, he 53 something about his mother that he did not know as a 54 ．She, herself, had never learned how to 55 ．
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